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Finding the Fourth Proportional to 18,757.40, 28,144.30 and 7,067.88

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Solution

The fourth proportional to 18,757.40, 28,144.30 and 7,067.88 is: 10,604.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.40 : 28,144.30 = 7,067.88 : x
  2. Step 2: Convert to fraction form
    18,757.40/28,144.30 = 7,067.88/x
  3. Step 3: Cross multiply
    18,757.40x = 28,144.30 × 7,067.88
  4. Step 4: Simplify right side
    18,757.40x = 198,920,599.88
  5. Step 5: Solve for x
    x = 198,920,599.88/18,757.40
  6. Step 6: Final answer
    x = 10,604.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.